WO2002013230A1 - High-pressure discharge lamp - Google Patents

High-pressure discharge lamp Download PDF

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Publication number
WO2002013230A1
WO2002013230A1 PCT/EP2001/008583 EP0108583W WO0213230A1 WO 2002013230 A1 WO2002013230 A1 WO 2002013230A1 EP 0108583 W EP0108583 W EP 0108583W WO 0213230 A1 WO0213230 A1 WO 0213230A1
Authority
WO
WIPO (PCT)
Prior art keywords
lamp
pressure discharge
discharge lamp
ignition circuit
series arrangement
Prior art date
Application number
PCT/EP2001/008583
Other languages
French (fr)
Inventor
Gerardus M. J. F. Luijks
Johan L. V. Hendrix
Original Assignee
Koninklijke Philips Electronics N.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koninklijke Philips Electronics N.V. filed Critical Koninklijke Philips Electronics N.V.
Priority to JP2002518496A priority Critical patent/JP2004506297A/en
Priority to EP01971780A priority patent/EP1210727A1/en
Publication of WO2002013230A1 publication Critical patent/WO2002013230A1/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/34—Double-wall vessels or containers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/54—Igniting arrangements, e.g. promoting ionisation for starting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/54—Igniting arrangements, e.g. promoting ionisation for starting
    • H01J61/541—Igniting arrangements, e.g. promoting ionisation for starting using a bimetal switch
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/02—Details
    • H05B41/04—Starting switches
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/02—Details
    • H05B41/04—Starting switches
    • H05B41/06—Starting switches thermal only
    • H05B41/08—Starting switches thermal only heated by glow discharge

Definitions

  • the invention relates to a high-pressure discharge lamp comprising a discharge vessel which is enclosed, with clearance, by an outer bulb which is provided, at an end, with a lamp cap, which lamp also comprises an ignition circuit including a series arrangement of a glow starter switch and an ohmic impedance.
  • a lamp of the type mentioned in the opening paragraph is disclosed in GB 1596161.
  • An advantageous aspect of a lamp having a built-in ignition circuit resides in that, in principle, said lamp can suitably be used as a retrofit lamp for an apparatus intended for a high-pressure mercury discharge lamp.
  • State-of-the-art high-pressure discharge lamps such as high-pressure sodium lamps and metal halide lamps, have a very high ignition voltage and, consequently, the ignition circuit must generate a high ignition pulse, for example of at least 2.5 kN.
  • comparatively large currents occur in the ignition circuit, which currents are limited as much as possible by means of the ohmic impedance.
  • the ohmic impedance must also be comparatively large, and a substantial degree of dissipation takes place in the ohmic impedance. This is disadvantageous and requires the use of special high-power ohmic impedances, which has a cost-increasing effect and hence is disadvantageous.
  • a lamp of the type mentioned in the opening paragraph is characterized, as a lamp in accordance with the invention, in that the ohmic impedance is formed by a halogen incandescent lamp.
  • a halogen incandescent lamp As an incandescent element, for example in the form of an incandescent filament, of an incandescent lamp is intended to adopt a high temperature and said incandescent element is also incorporated in a halogen-filled bulb, the incandescent lamp is resistant to comparatively prolonged and comparatively substantial dissipation of the incandescent body.
  • halogen incandescent lamp can also serve as a UN-enhancer.
  • a UN-enhancer has a very favorable effect on the speed and reliability with which the high-pressure discharge lamp is ignited. This is favorable for, in particular, metal halide lamps, as their ignition behavior is influenced to a substantial degree by the presence of free electrons.
  • such a metal halide lamp is provided with a discharge vessel having a ceramic wall.
  • the lamp thus formed has the advantage that it combines a favorable ignition behavior with very good light-technical properties, such as a high luminous flux and stable color properties.
  • the series arrangement also comprises a bimetal switch, which is closed in the cold state.
  • a bimetal switch which is closed in the cold state.
  • Fig. 1 shows a lamp in accordance with the invention
  • Fig. 2 shows an electrical circuit diagram of the lamp in accordance with Fig. 1.
  • Fig. 1 shows a high-pressure discharge lamp 1 comprising a discharge vessel 2 which is enclosed, with clearance 3, by an outer bulb 4, which is provided, at an end, with a lamp cap 5, which lamp also comprises an ignition circuit 30, which includes a series arrangement of a glow starter switch 35, an ohmic impedance 10 in the form of a halogen incandescent lamp and a bimetal switch 36.
  • the sequence of the elements of the series arrangement is arbitrary.
  • the discharge vessel 2 is provided, on either side, with a projecting plug 18, 19 accommodating a lead-through interconnecting inner electrodes 8, 9 and current supply conductors 28, 29.
  • the current supply conductors are electrically connected to electric contacts 26, 27 of the lamp cap 5.
  • the lamp 1 is connected with the electric contacts 26, 27 to a power supply source NB in a customary manner via a stabilization ballast 100.
  • the lamp is a high-pressure sodium lamp having a rated power of 400 W.
  • the lamp is connected to a supply source of 220 N, 50 Hz, via a BS ⁇ 400L 33-type ballast, manufactured by Philips.
  • the lamp is a metal halide lamp having a rated power of 400 W.
  • the discharge vessel of the lamp has a ceramic wall.
  • the filling of the discharge vessel includes, apart from Hg and ⁇ a, iodides of Tl, Dy, Ca, Ho and Tm and Xe as the starting gas.
  • a supply source can suitably be used to operate the lamp via a MH 400W CWA 71 A6091-t ⁇ e ballast.
  • the ballast can be connected to a 60 Hz supply source with a voltage ranging between 120 and 277 N, and supplies a voltage of 135 N to the lamp terminals.
  • the halogen incandescent lamp which forms part of the ignition circuit incorporated in the lamp is a 230 N, 150 W halogen-a type lamp, manufactured by Philips.
  • the halogen incandescent lamp is provided with a quartz-glass envelope.
  • the incandescent lamp is highly heat-resistant. This has the advantage that there is substantial freedom regarding the placement of the halogen incandescent lamp in the outer bulb.
  • the glow starter switch for example a retrolux-type glow starter, which is known per se, manufactured by Philips, and the bimetal switch may form a compound module.
  • the maximum value of the inrush current through the ignition circuit is 5.8 A.
  • the average short- circuit current through the ignition circuit is 0J3 A.
  • the lamp is a metal halide lamp which can suitably be operated on a MH 175W CWA 71 A5590-type ballast, manufactured by Advance Transformer.
  • the incandescent lamp forming part of the ignition circuit is of the same type as that used in the preceding example.
  • the maximum current through the series arrangement is 4 A
  • the average short-circuit current through the ignition circuit is 0.69 A.
  • the generated ignition pulse exceeds 2.5 kN, and the temperature of the glow starter switch is below 250 °C.
  • the ignition circuit described herein was also subjected to a switching life test, wherein the supply voltage was alternately switched on for 5 s and switched off for 35 s. After 2000 switching operations, the generated ignition pulse is still > 3 kN. In another test, the lamp was ignited in a dark environment and after a long residence time in a dark environment. In this test, no appreciable ignition delay occurred.

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  • Discharge Lamps And Accessories Thereof (AREA)

Abstract

The invention relates to a high-pressure discharge lamp comprising a discharge vessel which is enclosed, with clearance, by an outer bulb. The outer bulb is closed at one end by a lamp cap. The lamp is provided with an ignition circuit including at least a series arrangement of a glow starter and an ohmic impedance. According to the invention, the ohmic impedance is formed by a halogen incandescent lamp.

Description

High-pressure discharge lamp
The invention relates to a high-pressure discharge lamp comprising a discharge vessel which is enclosed, with clearance, by an outer bulb which is provided, at an end, with a lamp cap, which lamp also comprises an ignition circuit including a series arrangement of a glow starter switch and an ohmic impedance.
A lamp of the type mentioned in the opening paragraph is disclosed in GB 1596161. An advantageous aspect of a lamp having a built-in ignition circuit resides in that, in principle, said lamp can suitably be used as a retrofit lamp for an apparatus intended for a high-pressure mercury discharge lamp. State-of-the-art high-pressure discharge lamps, such as high-pressure sodium lamps and metal halide lamps, have a very high ignition voltage and, consequently, the ignition circuit must generate a high ignition pulse, for example of at least 2.5 kN. As a result, comparatively large currents occur in the ignition circuit, which currents are limited as much as possible by means of the ohmic impedance. Consequently, however, the ohmic impedance must also be comparatively large, and a substantial degree of dissipation takes place in the ohmic impedance. This is disadvantageous and requires the use of special high-power ohmic impedances, which has a cost-increasing effect and hence is disadvantageous.
It is an object of the invention to provide a means for counteracting said drawbacks. To achieve this, a lamp of the type mentioned in the opening paragraph is characterized, as a lamp in accordance with the invention, in that the ohmic impedance is formed by a halogen incandescent lamp. As an incandescent element, for example in the form of an incandescent filament, of an incandescent lamp is intended to adopt a high temperature and said incandescent element is also incorporated in a halogen-filled bulb, the incandescent lamp is resistant to comparatively prolonged and comparatively substantial dissipation of the incandescent body. Large-scale use of halogen incandescent lamps in a large power range for illumination purposes further has the advantage that there is ample supply of such lamps, so that a person skilled in the art can readily select, at comparatively low costs, a suitable halogen incandescent lamp for use in the ignition circuit of the lamp in accordance with the invention. Surprisingly, it has been found that the halogen incandescent lamp can also serve as a UN-enhancer. A UN-enhancer has a very favorable effect on the speed and reliability with which the high-pressure discharge lamp is ignited. This is favorable for, in particular, metal halide lamps, as their ignition behavior is influenced to a substantial degree by the presence of free electrons. Preferably, such a metal halide lamp is provided with a discharge vessel having a ceramic wall. The lamp thus formed has the advantage that it combines a favorable ignition behavior with very good light-technical properties, such as a high luminous flux and stable color properties.
Preferably, the series arrangement also comprises a bimetal switch, which is closed in the cold state. This has the advantage that the series arrangement can be electrically switched off as soon as the lamp has been ignited, for example under the influence of the heat development resulting from the discharge. A further advantage resides in that, after lamp extinction and re-application of a supply voltage, ignition voltage peaks will not be generated until after the bimetal switch has cooled to such temperature that it is in the closed state. It is thus precluded that the ignition circuit is needlessly loaded.
These and other aspects of the invention will be apparent from and elucidated with reference to the embodiment(s) described hereinafter. In the drawings:
Fig. 1 shows a lamp in accordance with the invention, and Fig. 2 shows an electrical circuit diagram of the lamp in accordance with Fig. 1.
Fig. 1 shows a high-pressure discharge lamp 1 comprising a discharge vessel 2 which is enclosed, with clearance 3, by an outer bulb 4, which is provided, at an end, with a lamp cap 5, which lamp also comprises an ignition circuit 30, which includes a series arrangement of a glow starter switch 35, an ohmic impedance 10 in the form of a halogen incandescent lamp and a bimetal switch 36. The sequence of the elements of the series arrangement is arbitrary. The discharge vessel 2 is provided, on either side, with a projecting plug 18, 19 accommodating a lead-through interconnecting inner electrodes 8, 9 and current supply conductors 28, 29. The current supply conductors are electrically connected to electric contacts 26, 27 of the lamp cap 5. In Fig. 2, the lamp 1 is connected with the electric contacts 26, 27 to a power supply source NB in a customary manner via a stabilization ballast 100. In a practical embodiment of a lamp in accordance with the invention, the lamp is a high-pressure sodium lamp having a rated power of 400 W. The lamp is connected to a supply source of 220 N, 50 Hz, via a BSΝ 400L 33-type ballast, manufactured by Philips. In another embodiment, the lamp is a metal halide lamp having a rated power of 400 W. The discharge vessel of the lamp has a ceramic wall. The filling of the discharge vessel includes, apart from Hg and Νa, iodides of Tl, Dy, Ca, Ho and Tm and Xe as the starting gas. A supply source can suitably be used to operate the lamp via a MH 400W CWA 71 A6091-t ρe ballast. The ballast can be connected to a 60 Hz supply source with a voltage ranging between 120 and 277 N, and supplies a voltage of 135 N to the lamp terminals.
The halogen incandescent lamp which forms part of the ignition circuit incorporated in the lamp is a 230 N, 150 W halogen-a type lamp, manufactured by Philips. The halogen incandescent lamp is provided with a quartz-glass envelope. As a result, the incandescent lamp is highly heat-resistant. This has the advantage that there is substantial freedom regarding the placement of the halogen incandescent lamp in the outer bulb. The glow starter switch, for example a retrolux-type glow starter, which is known per se, manufactured by Philips, and the bimetal switch may form a compound module.
In practice it is found that during igniting and operating said lamp, the maximum value of the inrush current through the ignition circuit is 5.8 A. The average short- circuit current through the ignition circuit, however, is 0J3 A. In a further practical embodiment, the lamp is a metal halide lamp which can suitably be operated on a MH 175W CWA 71 A5590-type ballast, manufactured by Advance Transformer. The incandescent lamp forming part of the ignition circuit is of the same type as that used in the preceding example. In this further example, the maximum current through the series arrangement is 4 A, and the average short-circuit current through the ignition circuit is 0.69 A.
In both practical embodiments, the generated ignition pulse exceeds 2.5 kN, and the temperature of the glow starter switch is below 250 °C.
The ignition circuit described herein was also subjected to a switching life test, wherein the supply voltage was alternately switched on for 5 s and switched off for 35 s. After 2000 switching operations, the generated ignition pulse is still > 3 kN. In another test, the lamp was ignited in a dark environment and after a long residence time in a dark environment. In this test, no appreciable ignition delay occurred.

Claims

CLAIMS:
1. A high-pressure discharge lamp comprising a discharge vessel which is enclosed, with clearance, by an outer bulb which is provided, at an end, with a lamp cap, which lamp also comprises an ignition circuit including a series arrangement of a glow starter switch and an ohmic impedance, characterized in that said ohmic impedance is formed by a halogen incandescent lamp.
2. A high-pressure discharge lamp as claimed in claim 1, characterized in that the lamp is a metal halide lamp.
3. A high-pressure discharge lamp as claimed in claim 1 or 2, characterized in that the lamp comprises a discharge vessel with a ceramic wall.
4. A high-pressure discharge lamp as claimed in claim 1 or 2, characterized in that the series arrangement also comprises a bimetal switch, which is closed in the cold state.
PCT/EP2001/008583 2000-08-08 2001-07-25 High-pressure discharge lamp WO2002013230A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2002518496A JP2004506297A (en) 2000-08-08 2001-07-25 High pressure discharge lamp
EP01971780A EP1210727A1 (en) 2000-08-08 2001-07-25 High-pressure discharge lamp

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP00202800.9 2000-08-08
EP00202800 2000-08-08

Publications (1)

Publication Number Publication Date
WO2002013230A1 true WO2002013230A1 (en) 2002-02-14

Family

ID=8171898

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/008583 WO2002013230A1 (en) 2000-08-08 2001-07-25 High-pressure discharge lamp

Country Status (5)

Country Link
US (1) US6661177B2 (en)
EP (1) EP1210727A1 (en)
JP (1) JP2004506297A (en)
CN (1) CN1242451C (en)
WO (1) WO2002013230A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003043054A3 (en) * 2001-11-15 2003-10-23 Koninkl Philips Electronics Nv High-pressure discharge lamp
EP2190266A1 (en) * 2008-11-17 2010-05-26 Dietmar F. Brück Device and method for switching a light source

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ534330A (en) * 2002-02-19 2006-08-31 Access Business Group Int Llc Removable closure assembly for a water treatment system
WO2005034165A1 (en) * 2003-10-02 2005-04-14 Koninklijke Philips Electronics N.V. Tanning apparatus
US20110187256A1 (en) * 2004-12-17 2011-08-04 Koninklijke Philips Electronics, N.V. Multipurpose lighting unit
DE102005061832A1 (en) * 2005-12-23 2007-06-28 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH High pressure discharge lamp with improved ignitability and high voltage pulse generator
US20090051295A1 (en) * 2006-02-07 2009-02-26 Koninklijke Phillips Electronics N.V. apparatus for radiating an object with uv radiation
CN101946564A (en) * 2008-02-14 2011-01-12 皇家飞利浦电子股份有限公司 Be used to control the control device of discharge lamp
CN102791066A (en) * 2012-08-04 2012-11-21 庄景阳 Device for solving discharge tube dark effect by utilizing LED (Light-Emitting Diode) lamp to illuminate

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3048741A (en) * 1960-08-24 1962-08-07 Duro Test Corp Arc lamp with self-ballasted arc tube and improved lumen maintenance
GB1596161A (en) * 1978-04-28 1981-08-19 Cates J Starting of high pressure sodium high presure mercury halide and low pressure sodium discharge lamps by means of glow type starter switches
US5531250A (en) * 1994-05-05 1996-07-02 Tdw Delaware, Inc. Device for plugging the interior of a pipe
US5973453A (en) * 1996-12-04 1999-10-26 U.S. Philips Corporation Ceramic metal halide discharge lamp with NaI/CeI3 filling

Family Cites Families (5)

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Publication number Priority date Publication date Assignee Title
US4268780A (en) * 1980-03-28 1981-05-19 Gte Products Corporation Integrated fluorescent-incandescent lamp assembly
JPS5935354A (en) * 1982-08-23 1984-02-27 Iwasaki Electric Co Ltd High pressure metal vapor discharge lamp
US4494041A (en) * 1983-02-02 1985-01-15 Gte Products Corporation Incandescent ballast assembly
WO2000033619A1 (en) * 1998-11-30 2000-06-08 Koninklijke Philips Electronics N.V. Glow discharge starter
EP1105916B1 (en) * 1999-06-16 2004-12-01 Koninklijke Philips Electronics N.V. Metal halide lamp

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3048741A (en) * 1960-08-24 1962-08-07 Duro Test Corp Arc lamp with self-ballasted arc tube and improved lumen maintenance
GB1596161A (en) * 1978-04-28 1981-08-19 Cates J Starting of high pressure sodium high presure mercury halide and low pressure sodium discharge lamps by means of glow type starter switches
US5531250A (en) * 1994-05-05 1996-07-02 Tdw Delaware, Inc. Device for plugging the interior of a pipe
US5973453A (en) * 1996-12-04 1999-10-26 U.S. Philips Corporation Ceramic metal halide discharge lamp with NaI/CeI3 filling

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003043054A3 (en) * 2001-11-15 2003-10-23 Koninkl Philips Electronics Nv High-pressure discharge lamp
EP2190266A1 (en) * 2008-11-17 2010-05-26 Dietmar F. Brück Device and method for switching a light source

Also Published As

Publication number Publication date
EP1210727A1 (en) 2002-06-05
CN1242451C (en) 2006-02-15
US20020047529A1 (en) 2002-04-25
US6661177B2 (en) 2003-12-09
CN1386295A (en) 2002-12-18
JP2004506297A (en) 2004-02-26

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